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[bug #18502] Suboptimal cache configuration for IA-32 processors

From: Barry deFreese
Subject: [bug #18502] Suboptimal cache configuration for IA-32 processors
Date: Thu, 14 Dec 2006 02:03:10 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0

Follow-up Comment #2, bug #18502 (project hurd):

OK, I built gnumach with the following in model_dep.c:

set_cr0((get_cr0() | CR0_PG | CR0_WP) & ~(CR0_CD | CR0_NW));

And I got worse performance:

0m0.040s 0m0.130s
0m0.000s 0m0.000s

Booted back to normal gnumach:

0m0.010s 0m0.020s
0m0.000s 0m0.000s

That is just from running times on a little C program that counts to
1000000000, so it's obviously not scientific.


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